Marine ornithologist Tammy Russell recently reported a troubling increase in seabird carcasses found along San Diego’s beaches, highlighting the impact of a prolonged marine heatwave off the California coast. This phenomenon has severely affected seabirds like California brown pelicans, loons, and grebes, leading to mass starvation due to reduced nutrient-rich waters where their prey, such as krill and anchovies, thrive.
Record ocean temperatures have exacerbated the crisis, with NOAA confirming the emergence of a significant El Niño this June, expected to intensify in the coming years. Although seabird die-offs regularly occur, the frequency has increased dramatically with rising ocean temperatures. Recent studies show warm coastal waters have persisted unusually long, disrupting food webs and contributing to higher seabird mortality rates.
Wildlife rehabilitation centers report treating numerous weakened birds, particularly young ones, many of which showed malnutrition issues. The California Department of Fish and Wildlife indicates that while some deaths may be linked to a recent breeding spike, the marine heatwave is undeniably impacting seabird populations. Historically, similar warm water events have led to significant ecological disruptions, complicating the recovery of affected species.
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